Celebrity So Fine at 39: Age-Defying Beach Bods From Jenny McCarthy and Jude Law to Cameron Diaz, see which almost-40 stars are undressed to impress By Kiran Hefa Published on June 2, 2011 10:00 AM Share Tweet Pin Email Trending Videos 01 of 11 JENNY MCCARTHY Jason Winslow/Splash News Online She may be a dedicated mom, but the former Playboy pinup has no problem flaunting her bikini body during a beach day in Miami in March. "I want to look good," McCarthy told PEOPLE of her commitment to working out. "It makes me feel good." 02 of 11 JOSH DUHAMEL Bauer-Griffin The Transformers hunk kicks off another ab-tastic year, taking a dip in the ocean during a St. Barts vacation with wife Fergie in January. 03 of 11 SOFIA VERGARA Jean Baptiste Lacroix/WireImage Not even a one-piece bathing suit can conceal the Modern Family stunner's enviable curves, which Vergara puts to good use while shooting a commercial in Santa Monica, Calif., in March. But looking good is not without hard work for the actress, who told PEOPLE, "I'm not crazy about working out. I do it because of my health." 04 of 11 JUDE LAW Bauer-Griffin PEOPLE's Sexiest Man Alive of 2004 shows he's still got it, pairing his board shorts with a set of washboard abs while taking a dip in Cap d'Antibes, France, on May 24. 05 of 11 GABRIELLE UNION PA Photos/Landov Attending the opening of TAO Beach in Las Vegas, the actress bares her body in a yellow bikini on April 2. "I'm going to be brutally honest: There is nothing about working out I enjoy except the results," Union once told PEOPLE. 06 of 11 GWYNETH PALTROW Islandpaps/Splash News Online "I never thought that I'd be considered to have a good body," the mom-of-two told Self only two months after sporting a skimpy bikini in the Caribbean. "But my trainer, Tracy Anderson, completely changed my legs, butt, arms and stomach. I feel better than ever, too." 07 of 11 GERI HALLIWELL Next/Splash News Online Why hire a model when you can do it yourself? The Spice Girl takes center stage in the ad campaign for her swimwear collection, Geri by Next. But while Halliwell works to stay in shape, she no longer considers herself an "exercise freak," telling the U.K. edition of Glamour, "Yoga has always been a consistent, loving thing to do. I'm not into the Madonna-esque yoga-cising." 08 of 11 JOEY MCINTYRE Talk about "Hangin' Tough!" The New Kid on the Block – and new dad! – proves he's still a heartthrob with a shirtless role in the music video for his solo single, "Here We Go Again." 09 of 11 ERIC DANE Ramey Grey's Anatomy's Dr. McSteamy turns up the heat off-camera in barely-there trunks while vacationing in Portofino, Italy, last May. "Weight-lifting – it gets the aggression out," Dane told PEOPLE of his preferred workout routine. "No yoga! I'm competitive and you can't score points in yoga." 10 of 11 ANGIE HARMON Seth Browarnik/Startraks "I'm trying to figure out how to get back in shape but still keep these new attributes," the gorgeous mom-of-three told PEOPLE of her post-baby curves, which she showed off poolside in Vieques, Puerto Rico, in January. 11 of 11 CAMERON DIAZ INF It's all good for the Bad Teacher star, who flaunts her ripped form during a Miami vacation with boyfriend – and workout partner – Alex Rodriguez in February. "I learned what it feels like to be strong," Diaz told Playboy of her new figure.